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WELDERS ITEM 8201N ÷ 8214N
EDITION: MAY 2008 PAGE 12 OF 32
Before starting the welding process, check the welding conditions (time, pressure, etc.). If you are
operating spot welding, use two off-cuts of the sheet to weld, carry out two spots at the same
distance used during the production, then remove the first and check the second: the spot is
correct when the pulling test causes the coming out of the weld nugget with the hole of a sheet,
and the twist test shows a pure area without porosity or causes the coming out of the nugget.
Similar considerations and similar tests should be carried out also for projecting welding.
During the production it is advisable to monitor those parameters which can alter the working
conditions and thus the welds quality. If you are operating spot welding, always monitor the
electrodes which must always be clean, without any deformation and must have the proper
diameter according to the work to be carried out. Check that there are not strong changing in the
welder supply pressure as they could modify the force on the electrodes and thus the welding
quality.
Do not use sealing products to remove water losses on the electrodes conic connection. To
facilitate the electrode removal and to prevent from both cone seizure and water losses, use high
conductivity grease similar to the standard one.
The cooling water must circulate inside the welder for a few minutes after having completed the
production in order to allow the welder cooling. To prevent from both losses and moisture
deposits, do not leave the cooling circuit open when the unit is not used.
Electrodes must not be used to force the clamping of the pieces to weld.
We recommend you to notice the adjustments carried out for each type of piece. In order to
make it easier, a specific table has been added at the end of this manual.
